Uncle Sam and his nephew Michigan are looking to stop ANYTHING that could be used as commercial. If you have a pickup truck with a flatbed trailer and a push lawnmower on it, you'd better be DOT compliant! I won't put a thing on my conversion. My acapella group has had enough to deal with since our cube truck has a GVWR of 10,500. To sing, not push gear up a ramp, and use a lift gate instead, I had to become a truck driver! Great friends of mine were returning from their summer home in Florida. They were pulling a 30ft car hauler behind a Ford f350. No lettering. They crossed the Michigan/Indiana border and were almost immediately pulled over by DOT. The officer stated that they were pulling over vehicles that LOOKED like they could be being used for commercial use without the proper identification. Guilty until proven innocent!